Which is the best Rom for s4 comparing by stability? I want to use cyanogenMod, which issues did you face when you install it?

Is there any way to install raw Android and open it as root permissions? I dont know what will happened with drivers ?...

I recommend installing Dastin's HOOD POPE CM10.2 rom (it's up near the top of the development forum). Being Cyanogenmod, it works very similarly to stock Android. I've been running as a daily driver for the past couple weeks, and I've had no trouble with it.

I am using it since 2 weeks and it runs surprisingly well. Its based on CM, but has a few more configuration options.

Keep in mind that you loose 3D camera once you go for a custom ROM > Android 4.0.3 because there are no drivers (yet)

if you don't need 3D camera, you should upgrade to android 4.4. I'm currently using GSM version [ROM][HW-VSYNC] CyanogenMod 11.0 - KitKat 4.4.2 - 11-March - UNOFFICIAL, and i'm super happy with it. The only bad thing is bad battery life (still haven't manage to use it more than 1day), but everything else is just superb

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